I've read in some reviews that it is a normal fan, this machine, wanted to convince myself of it but. And it's actually just a normal fan. Perhaps this equipment has actually advertised by the manufacturer function to ventilate the whole room, but I have it in my room about 20 square meters not notice. Various positions and locations tested in space, but the effect is not turned on. In addition, the fan already on the 2nd level is too loud to run around him alongside. The 3rd stage is like an aircraft turbine. Both of the power and of the noise forth. With me still is added negative that the fan is a very annoying and loud noise, when it tilts his head slightly upward. It sounds as if the leaves touch the inside of the housing. In conclusion, I am sorry to say: a flop and no purchase recommendation.
